Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Udo W. Stephan"'
Publikováno v:
Plant, Cell and Environment. 28:365-374
Heavy metals are essential for basic cellular processes but toxic in higher concentrations. This requires the precise control of their intracellular concentrations, a process known as homeostasis. The metal-chelating, nonproteinogenous amino acid nic
Autor:
Rüdiger Hell, Udo W. Stephan
Publikováno v:
Planta. 216:541-551
Iron is an essential micronutrient with numerous cellular functions, and its deficiency represents one of the most serious problems in human nutrition worldwide. Plants have two major problems with iron as a free ion: its insolubility and its toxicit
Autor:
Renate Manteuffel, Udo W. Stephan, Erik Böer, Regina Stoltenburg, Laura Guengerich, Thomas Wartmann, Michael Melzer, Gerd Gellissen, Ines Bube, Gotthard Kunze
Publikováno v:
Yeast. 19:849-862
The yeast Arxula adeninivorans is characterized by a temperature-dependent dimorphism. A. adeninivorans grows as budding cells at temperatures up to 42°C, but forms mycelia at higher temperatures. A strong correlation exists between morphological st
Autor:
A. Herbik, Hans-Peter Mock, G. Koch, Michael Melzer, Dimitar Douchkov, Udo W. Stephan, Helmut Bäumlein
Publikováno v:
Plant and Soil. 241:115-119
Basic cellular processes such as electron transport in photosynthesis and respiration require the precise control of iron homeostasis. To mobilise iron, plants have evolved at least two different strategies. The non-proteinogenic amino acid nicotiana
Autor:
Udo W. Stephan
Publikováno v:
Plant and Soil. 241:19-25
Iron is abundant in most soils, but ferric compounds are almost insoluble. Therefore, plant roots use as tools acidification and enzymatic reduction of iron at the outer cell surface (strategy I) or solubilization by phytosiderophores, which are spec
Autor:
Heike Lange, Gilbert Engler, Sergei Kushnir, Riet De Rycke, Mark W. Davey, Sergei Storozhenko, Udo W. Stephan, Gyula Kispal, Elena Babiychuk, Jutta Papenbrock, Roland Lill, Marc Van Montagu
Publikováno v:
The Plant Cell. 13:89-100
A mutation in the Arabidopsis gene STARIK leads to dwarfism and chlorosis of plants with an altered morphology of leaf and cell nuclei. We show that the STARIK gene encodes the mitochondrial ABC transporter Sta1 that belongs to a subfamily of Arabido
Publikováno v:
Physiologia Plantarum. 106:82-89
The concentration of iron within cells has to be precisely regulated because shortage as well as surplus may be precarious for the survival of the cell. The maintenance of iron homeostasis in shoot organs requires an efficient signalling of the leaf
Publikováno v:
Plant Molecular Biology. 37:701-714
Metallothioneins are small cysteine-rich proteins with strong binding capacity for heavy metals. In animals and fungi they are involved in cellular detoxification processes. Although genes for similar proteins exist in plants, less is known about the
Autor:
A. Herbik, Martin W. Ganal, Hans‐Jörg Balzer, Anatoli Giritch, Helmut Bäumlein, Udo W. Stephan
Publikováno v:
Europe PubMed Central
The tomato mutant chloronerva exhibits a defect in iron-uptake regulation. Despite high apoplastic and symplastic iron concentrations, the mutant shows characteristic symptoms of iron deficiency. Using a subtractive-hybridisation approach, we have sc
Autor:
Ilka Schmidke, Udo W. Stephan
Publikováno v:
Physiologia Plantarum. 95:147-153
The metal micronutrients (MN) copper, iron, manganese, and zinc are transported via the phloem in the course of remobilization and circulation. The extent of these processes and transport species are still largely unknown. The Ricinus seedling was us